Meanwhile, to reduce the error accumulation, many methods proposed to directly regress the haze-free image. Such as Li et al. [1]} applies a light-weight CNN, Ren et al. [2]} and Chen et al [3]} perform a gated fusion module, Liu et al. [4]} adopts a dual residual connection structure, Liu et al. [5]} introduces multi-scale network with attention units, Dong et al. [6]} develops a fusion discriminator, and Dong et al. [7]} utilizes a dense feature fusion module.
